After getting putoff from php.net to learn php 7 (because it is not beginner friendly) and raoming around youtube for 1.5mnth to learn php and failing to get proper tutorials there, I returned to php.net. Was reading the CONSTANT chapter and really got smurf.Read this page and tell me if it is a beginner friendly tut or not:

I find contributor's quarreling in the comments of what works and what not. Obviously, one of them is right and the other wrong. Now, question is, why did php.net put the arguments of the incorrect person in front of us getting us newbies to read quarrels of an incorrect programmer going back and forth with the correct programmer ? Result ? Newbies get confused and put-off from php. Php seems like a neverending mess!Anyway, I have come to the conclusion not to get my tutorial from there. Can use php.net as a reference in the future once more experienced. And so, heading towards tutoprialspoint.com.

This however, just lists the newly added features on php 7 and so no good to me:

But, looking at the chapters in their list, which ones (functions, etc.) are deprecated in php 7 so I shouldn't bother with them ? Do you mind pointing-out the chapters and their links from their tutorial ? You can find their chapters on the leftside of their page: